Process of producing grease packages



June 26, 1945. H. I- BODE PROCESS OF PRODUCING GREASE PACKAGES Filed May 4. 1942 I IIHH Patented June 26,. i945 PROCESS OF PRODUCING GREASE PACKAGES Harry L. Bode, Webster Groves, Mo assignor to i Gaylord Container Corporation, St. Louis, Mo., a corporation of Maryland 3 K Application May 4, 1942, Seam... 441 3602 6 Claims. ((11.226-19) This invention relates to the packaging of grease, especially grease that is used for lubrieating purposes. Grease is-usually shipped in ment applies not only to untreated paper and paperboard but also to paper and paperboard coated with any of the usualparafiin coating compositions used for rendering the paper imof any suitable shape. The inner surface of this container! iscoated, as shown at 2a in Fig.4 with a liquid composition consisting of a waxmetal or wood containers which are relatively permeable to ordinary liquids. The principal object of the. present inventionis to devise a satisfactory paperboard container for grease and to devise a method of packaging grease therein. The invention consists principally in coating the inside of apaperboard container with a. paraffin wax-in-water emulsion containing graphite in suspension and then pouring melted grease into the container. It also consists in the container coated with said composition and dried and also in thepackage consisting of the container with the grease melted: therein. It also consists in specific details hereinafter described and claimed.

Fig. 3 is a similar view of a package consisting. of the containerwith grease therein,

Fig; 4 is an enlarged fragmentary sectional view of the container wall with the wax-in-water coating freshly applied thereto,

Fig.5 is a similar fragmentary view showing the coating after absorption and evaporation of the water contentof the coating, that is, in a condition ready to receive the grease; and

Fig.- 6 is a similar fragmentary view of the package showing the film of graphite intervening between the paperboard and the grease.

I start with a container I made of paperboard," which term is used herein to include fiberboard, chipboard and similar material and disappears.

grease.

in-water emulsion having finely divided graphite suspended therein. The greater portion of the water of the emulsion is absorbed by thecardboard leaving behind a film of wax and graphite as shown at 21) in Figs:'2 and 5. Then the container is permitted to dry. Melted grease 3 is then poured into the container with the result that the wax of the coating is melted anda portion thereof is absorbed into the wall of the container and the rest is absorbed by the melted The graphite then remains behind as a barrier coat or film 20 between the grease and the wall of the container and functions to prevent the grease from being absorbed by the wall of the container and also functions to prevent or minimize the sticking of the grease: to the Wall of the container. Thus the initial wax-inwater emulsion serves as a temporary or fugitive vehicle or medium by which graphite can be applied as a thin continuous film between the] grease and the wall of the container. The-water component of the emulsion is evaporated and The wax component impregnates and Waterproofs the paperboardwithout discoloring or impairing the outer surface thereof; and as the paraffin wax is similar in character to the grease, the qualities of the grease are notappreciably affected by the intrusion of wax into it.

The graphite, which remains as a barrier. film. adheres more strongly to the paperboard than to 1 the grease so that very little,if any, graphite vgets into the grease; and as graphite is itself '70 parts byweight of triethanolamine, about parts by weight of stearic acid and. about 1060 parts by weight of water. The triethanolamine is an emulsifyingagent that effectively disperses the wax in the water and the stearic acid combines with the emulsifying agent to form a soap that aids in emulsification. In preparing the emulsion, the parafin and the stearic acid were fmelted and heated in a water bath to a temperature of F. The triethanolamine was added to the emulsion water and the solution boiled and the paraflih-and stearic acid solution were then added with constant stirring until the liquid became 0001. Thi produced an emulsion containing aboutsixty percent of water.

parts by weight of water, the sodium silicate being used as an emulsifying agent.

In preparing emulsion No. 2, the'paraffinand,

stearic acid were melted and heated in a water bath to 170 F. The sodium silicate was dissolved in the emulsion water and thissolutionwas heated to boiling, The hot parafIin-stearicaci'd mix:

ture was slowly added to the boiling sodium silicate solution and constantly stirredi until; the I mixture cooled. This produced an emulsion containing about 76% water.

When a, harder final; oat ng s: esir d, carnauba wax may us d; in cembination. with the paraflin. A, suitable emuls Qn f; th s ime;

conforming substantially to the typical formulas hereinbefore set out may be applied to a paperboard container at the rate of from 300 to 500 v square feet per gallon whereupon the water is quickly absorbed by the paperboard and evaporated, leaving a waxy coat. This coat contains enough graphite to form a continuous film when the; wax is melted and passes'by absorption into the grease and the Wall of the container. The wax is beneficial to the paperboard and neither the wax nor the other ingredients are-harmful to thegrease. After the Water and the Wax are into the paperboard.

absorbed, the graphite remains as an efiective barrier that keeps the grease from penetrating hereinafter designated enrulsicnhlo; 3, may be made withabout iooiparts y weight of par fli havin a melting point of 13.5 F:, a out lfi nart byweight of; carnaubawax, refinedyellow, about 90 parts by weight; of: oleic; acid; about; 90: parts by weight of triethanolamine, about. 10 partsiby weightsof borax and about, MOON-parts by weight of water. The borax accelerates the actionof the emulsifying agent, and; makes for better spreading qualities. 7 This emulsion Nos 3, contains, about? 7,0,; percent. of water.

In preparing emulsion No. the narafin. and carnauba, wax were heated; together in a Water bath and the temperature maintained all-2,05?" E; While this 205 F; temperature was; maintained the oleic acid and triethanolamine were added to the-hot wan mixture. Theboraxwasj dissolved in the. emulsion water and this. solution was brought toboiling, when it Was: added to the. hot Wax mixture, with constantstirring. 1 Various grades. or finely divided graphitehave been found: satisfactory. in connection with emulasions. at the kind above specified; Thus, about 47: parts by. weight at powdered amorphous graphite, No. 325imeshzsize, gnaphitie carhoncontent84 to. 86 percent, may be used: withabout 9.5 parts by weigl'zt ofemulsion N10. 1, the-whole stirred inform a smooth, homogeneousrmintu-ne,

Additional? water, say: ordinarily about 8; parts; by

weightof water, map be added" in conformity-with common practice to better adapt the composition to, the: particular method 11156611113 apn ying it; to.

thecontainer. Likewise, 17; parts b weight 01" flakes graphite, 80 percent graphiticcarbon, ground .to retain about 30 percent on alt-in .1110 mesh; 'sietv i and aver gin around 550 per en passing: a Not 200.! mesh sieve; and 17 parts y weight of powdered amorphous;- graphiteipNn, 325 mesh, graphic-tic carbon con-tent B l percent to:86 percent, may beused' with-95; parts; by weightof emulsion No. 1:, with Water added, if desired to suit. the: method 0f; application to the n ai-ner,

say about 4- parts: by Weight of water. Approx;- matel'y the same amountsof: r-aph-it may b used, With emulsionsv Nos. 2 and-,3.

It is to, be understood. thatthe proportions of the emulsion ingredients: hereinbetore specified are, ypic l; nd. subje t to variation p ovided-the raphit ntaini composi ion has; a, consislnThe process of packaging grease and the like'which comprises coating the inner surface of a paperboard container with a Wax-in-water emulsion containing graphite in suspension, permitting said container to becomesubstanal rr and; then mutin here se m i m t id? containe t e Emma we e se, being h h enou ha me aid ait: 1. e eby au t. to e etr te aidlha lr oard s id rea a-vi e afim of, an ma -ts ween the paperboard a d: he reas nrocessn i pa k gin ar ne nd ke w h am-ar ses. o n the ner is i a paperb rd c ntainer w th; a em compos tion cqns st narm niy f: aboutfififl narts y; we gh 01": parafiin. and. 106.0: partslev -w i ht i a d: c nt inin about; 930;- narts; of. raphite, p rmittingsaidcontainer a become su stantially dry and then p ur n th grease inmel edcondition: into said; conta ner he temperature oi said grease ein hi h enou htg melt aid wax thereby ca n t. tc penetrate: said paperboard and: said: grease; eav ng arfiixn. o graphite between the paperboardandthe; rease. The process. of: packaging grease andethe like; which comprises coating-theinner.- suntace of apaperboard container with an emulsified compositions consisting mainly: of approximately 50.0. parts by: weight of paraffin and 1.050: parts by weight ofwateu, aniemulsifyingnagent and from 5.60% to: 930 parts byweightofgraphite, per? mitting said; container. to, becomeysubstantially dryeand then pouring the. grease in, melted. con: ditioninto saidcontainer th temperature; of said grea e beinghigh enough tormeltsaid wax thereby causing it to penetrate said paperboard nds id; rease, eav n a. fi m of raph terbetweene aperboard: ndhe easer. 1

,4. The process,- of packaging grease and. the like which comprises coatingthe-inner suriiace of; a paperboard; container with an emu lsined qmposlt n consisting mainly or about fiiiflrnarts by wei ht of paraffin, and. aboutl liqfiw part-shy w i ht of: waterand an: emulsifyin asentecn- S s i e ab ut, 70 p rts. by wei ht.- Of: methanola i and a out .40:- parts y: weightqfwstearic.

c n rom; bo t 560 :11 2 B Q nar sba weight tan y: suita le for: np uing t to th aherbcarcl by Qrd narr methods,

a graphite-mummies; waar newater emulsin of: p te, rmittina sai -q ta become substantially dry and then: pouringgthagreasgin melted condition, into, said containenqthe t 'petature o-fi saidgrease bein hig lm-U h 9 melt said wax thereby causing it. to penetrate said paperboard and said, grease leaving: a of graphite between the paperboard and, the gre se l 1 e P s 0t cka in gr ase and the likewhich comprises, coating; the; surface oiat pe ardy co ta e with ailulsified composition consisting of about, 2160: parts by V r 2,378,972 weight of water, about 140 parts by Weigh t oi stearic acid, about 35 parts by weight of sodium silicate and from about 560 to about 930 parts by weight of graphite, permitting said container to become substantially dry and then pouring the grease in melted .condition into said container the temperature of said grease being high enough tomeit said wax thereby causing it to penetrate said paperboard and said grease, leaving a film of graphite between the paperboard and the grease.

6. The process of packaging grease and the i by weight of paraffin, about 100 partsby weight of carnaubawax, about 90 parts by weight of oleic acid, about 90 partsbyweight of triethanolamine, about 10 parts by Weightof borax and about 1600 parts by weight of water and 620 to 860 parts by weight of'graphite, permitting said container to become substantially dry and then pouring the grease in melted condition into said container the temperature of said greasebeing high enough to melt saidwax thereby causing it to penetrate said paperboard and said grease,

leaving a film of graphite between the paperboard and the grease. i

HARRY L. BODE. 

